Rochard (in the latest Humble Indie Bundle) uses Unity, and uses their native Linux deployment releasing with Unity 4 and available in Beta to preorder customers.

Unity is a great engine and is getting a lot of (well deserved) attention from bigger studios, which will continue to make the engine better. I've been using Unity for 5 years now and have tried other engines, but I always come back to Unity.

In about one year, all these Kickstarter projects using Unity will release and nobody will ever need to question it again.

The game is designed around being fair for all players. Beta testing will help this to be better. Basically, in this game, just as in SAGA, money will only give you more options and not necessarily allow you to play longer or with better cards. Sure, it's not perfect, but they really do try. If you have suggestions just pop into the SAGA Forums and speak your mind.

Also, I just wanted to state that this game will not be available for Linux until the Unity engine is, so I don't know why they put that in the press release, but there it is.